/*
 * Copyright © 2017 camunda services GmbH (info@camunda.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.camunda.client.impl.util;

import java.util.Map;
import org.junit.jupiter.api.extension.AfterEachCallback;
import org.junit.jupiter.api.extension.BeforeEachCallback;
import org.junit.jupiter.api.extension.ExtensionContext;
import org.junit.rules.ExternalResource;

/**
 * we still need to support JUnit 4 for {@link io.camunda.client.impl.worker.JobWorkerImplTest} that
 * uses {@link io.grpc.testing.GrpcCleanupRule}
 */
public final class EnvironmentExtension extends ExternalResource
    implements BeforeEachCallback, AfterEachCallback {

  private Map<String, String> previousEnvironment;

  @Override
  protected void before() {
    previousEnvironment = Environment.system().copy();
  }

  @Override
  protected void after() {
    Environment.system().overwrite(previousEnvironment);
  }

  @Override
  public void beforeEach(final ExtensionContext context) {
    before();
  }

  @Override
  public void afterEach(final ExtensionContext context) {
    after();
  }
}
